METEOROLOGICAL OBSERVATIONS AT WISLEY IN 1907. 525 



Regarding the year as a whole it was colder and drier than the average, 

 with a deficiency of sunshine and an unusual amount of cold unseasonable 

 wind, but without any other feature which differed markedly from the 

 average. There were three periods of exceptionally dry weather, one 



Fig. 95. — Mean Temperature of the Air for each Month of the Year compared 

 with the Average ; also the Means of the Highest and Lowest recorded 

 each Day, and the Lowest Temperature registered on the Grass. 



early in January, the second beginning in the latter part of March, and the 

 third in September, this last being the most marked of the three. The 

 amount of rainfall recorded at Wisley was 23-89 inches, and the number 

 of days on which rain fell to a measurable amount was 169. The amount 

 of bright sunshine recorded at Wisley was 1,542 hours, or 35 per cent, of 



